TYMap is a GIS (Geographic Information System) software, you can use it to view shape file and usgs dem file, modify the attribute table etc.

Features:

• Add and edit points, lines, or polygons
• Render type: Simple, ClassBreak, Categories (according to the attribute table)
• Symbol layer type of point layer: Simple marker, Character marker (You can enter any character)
• Fill type of polygon layer: Simple, Gradient, Hatch, Picture
• Attribute table adds other datas from table (similar to Join, but no correlation)
• Setup chart